I would not get too worried about the order in which these go out. This is not an invitation to confirm the order. This is just an SA wanting you to go over the options to be sure that what you saved whenever you made the reservation is still what you want.
After my test drive, one of the SAs at the studio checked my saved preferences and asked whether or not the test drive had changed my mind on anything. This is similar.
They also probably want to upsell some folks on options. "Are you sure you really don't want Surreal Sound Pro?" That sort of thing.
Bottom line: when Lucid does eventually send the invitations to confirm, they want you to be able to just say "yes" and be done with it. Rather than having to call your SA, make changes, etc. That will only slow down the process.
Each SA is going to be assigned X number of Touring customers. Many of them probably have their hands full with GT customers at the moment. While others may have a few more moments on their hands to get their list started. So the order of these emails is likely going to seem quite random.